Nathan Fillion Makes His ‘Lanterns’ Debut as Guy Gardner

Spoilers for Lanterns Season 1, Episode 6 follow.

Nathan Fillion has finally stepped fully into Lanterns, bringing Guy Gardner into the HBO Max drama after spending the season’s first five episodes outside the main action.

The sixth episode moves the story into its 2026 timeline and returns to the mystery introduced in the premiere: the death of Hal Jordan, played by Kyle Chandler. John Stewart, played by Aaron Pierre, has left the Green Lantern ring behind and built a very different life. His return to Rushville puts him back in the orbit of Hal, the case and a growing roster of Lanterns.

Guy Gardner arrives at a turning point

Fillion’s Guy appears as the new Green Lantern after John declines the role. The casting gives the episode a sharper comic edge, but Guy is not treated as a simple punch line. His public confidence and prickly personality position him as a contrast to John’s reluctance and Hal’s troubled history.

Guy’s most consequential scene comes when he visits John in jail after receiving a distress signal from Rushville. Their exchange draws directly on the tension created by John’s decision to give up the ring: Guy has the power and status John rejected, while John still understands the stakes of the crisis more clearly than anyone.

A bridge across the wider DC Universe

Fillion has described Guy as a visible thread running through the developing DC Universe. That idea fits the character’s function here. Rather than arriving as an isolated cameo, Guy connects the show’s detective story to the larger superhero world surrounding it.

The episode also expands the mythology around Hal and John without abandoning the murder investigation. Viewers see how the choices made a decade earlier have reshaped both men, while Guy’s presence introduces another version of what a Green Lantern can be.

For Fillion, the debut delivers on a promise the show had advertised before its premiere. For Lanterns, it opens a new relationship at exactly the moment the central mystery moves back to the foreground. Guy Gardner is now part of the investigation, and his arrival makes the path to the finale more unpredictable.